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| Area of a Circle |
| Area of Equilateral Triangle |
| Area of n gon |
| Area of a Parallelogram |
| Area of a Rectangle |
| Area of a Rhombus |
| Area of a Square |
| Area of a Trapezoid |
| Area of a Triangle |
| Base Area of Heptagon |
| Base Area of Hexagon |
| Base Area of Octagon |
| Base Area of Parallelogram |
| Base Area Pentagon |
| Base Area Rectangle |
| Base Area Square |
| Base Area Trapezoid |
| Base Area Triangle |
| Circumference of a Circle |
| Diagonals of N-gon |
| Distance Formula |
| Equation of a Circle |
| 45 45 90 Triangle Hypotenuse |
| 45 45 90 Triangle Legs |
| Heron’s Formula |
| Horizontal Line |
| Lateral Area of Cone |
| Lateral Area Cube |
| Lateral Area Cylinder |
| Lateral Area Prism |
| Lateral Area Pyramid |
| Lateral Area Rectangular Solid |
| Lateral Area Right Cone |
| Lateral Area Right Cylinder |
| Lateral Area Right Prism |
| Midpoint Formula |
| Perimeter of a Parallelogram |
| Perimeter of a Rectangle |
| Perimeter n gon |
| Perimeter of a Rhombus |
| Perimeter of a Square |
| Perimeter of a Trapezoid |
| Perimeter of a Triangle |
| Point Slope Form |
| Slope |
| Slope Intercept Form |
| Surface Area of a Cone |
| Surface Area of a Cube |
| Surface Area of a Cylinder |
| Surface Area of a Prism |
| Surface Area of a Pyramid |
| Surface Area of a Rectangular Prism |
| Surface Area of a right Cone |
| Surface Area of a Right Cylinder |
| Surface Area of a Right Prism |
| Surface Area of a Sphere |
| 30 60 90 Triangle short and long legs |
| Vertical Line |
| Volume of Cone |
| Volume of Cube |
| Volume of Cylinder |
| Volume of Prism |
| Volume of Pyramid |
| Volume Rectangular Solid |
| Volume Right Cone |
| Volume Right Cylinder |
| Volume Right Prism |
| Volume of a Sphere |
How to find the surface area of a Cone
The video works the problem Surface Area of a Cone
In order to find the surface area of a cone you add the lateral area plus the base area
The lateral area of a cone equals 1/2 dπ*s
D = diameter
S = slant height
Base Area = πr^2
Find the surface area of a cone with a diameter of 6 units and a height of 4 units.
Step 1. The radius = ½ diameter = 3 units
Step 2 Find the slant height by using the Pythagorean Theorem a^2+b^2=c^2
Use the height and radius to find the slant height 3^2+4^2=c^2 which equals 9 +16 = 25
√25=5 equals your slant height
Step 3 Now use 1/2 dπ*s
1/2 6π*5=3π*5=15π which will equals the lateral area
Step 4. Find the base area by using πr^2
π3^2 = π9
Step 5 Add the lateral and base area in order to get surface area
15π+9 π=24π units^2
Check out the Video if confused Surface Area of a Cone
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